| Popis: |
The primary purpose of the review is to describe the biological growth and its effects on the goepolymeric and ordinary concrete surfaces. As the concrete ages, the surface alkalinity wears off by carbonation and weathering,thus prepares a suitable environment for biological growth. Micro-organisms such as algae, fungi and various types of bacteria start to accumulate on the surface and subsequently penetrate into the micro-cracks of concrete structures, resulting in bursting stresses that can increase the size of cracks and may lead to spalling. Despite the natural resistance of concrete structures against biological growth in the early periods, anti-bacterial additives increase the resistance later. |
